Split Shaft People Conveyor Drive Maintenance
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Solution Overview
Problem
Existing people conveyor systems require extensive maintenance, leading to increased downtime and costs due to the complexity of replacing the shaft and tension member drive systems.
Innovation Solution
A split shaft configuration with detachable components allows for the removal and replacement of the shaft main portion without disassembling the shaft support portions, enabling the installation of the tension member in its endless configuration without disconnecting it, thus reducing maintenance time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a conventional solid shaft configuration is used, then the shaft provides sufficient structural strength and stability, but the maintenance time and complexity increase significantly when shaft replacement is required
Solution Approach 1:
The shaft is divided into a shaft main portion and at least one shaft support portion that can be detachably coupled. This segmentation allows the shaft main portion to be removed and replaced independently from the shaft support portions, enabling rapid maintenance without requiring complete shaft disassembly or tension member detachment, thus significantly reducing maintenance time while preserving structural integrity during operation
2Ease of repair
If the shaft is made detachable for easy maintenance, then the maintenance complexity reduces, but the structural strength and stability may be compromised
Solution Approach 1:
The shaft is segmented into a shaft main portion and shaft support portions with detachable coupling mechanisms. During normal operation, these portions are firmly coupled to provide full structural strength. During maintenance, the coupling can be detached to allow easy replacement of the shaft main portion. This segmentation enables the shaft to exhibit both high structural strength during operation and ease of maintenance during service intervals
Solution Approach 2:
The shaft transitions from a static, permanently fixed configuration to a dynamic configuration where the shaft main portion can be detachably coupled to shaft support portions. This dynamic capability allows the shaft to be firmly assembled during operation for maximum strength, and easily disassembled during maintenance for rapid replacement, thus achieving both structural integrity and maintenance ease at different operational states
3Area of stationary object
If the shaft diameter is increased to maintain space efficiency, then the space requirements are met, but the device complexity and manufacturing costs increase
Solution Approach 1:
The shaft is segmented into multiple portions that can be assembled in a compact arrangement. The shaft main portion and shaft support portions can be positioned closely together when coupled, maintaining efficient space utilization. This segmentation allows the shaft to occupy minimal space during operation while enabling easy disassembly for maintenance, avoiding the need for larger diameter shafts that would increase both space requirements and manufacturing complexity
Data Source
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AI summary
The invention relates to a people conveyor drive (40) of a people conveyor (1) comprising a plurality of treads (13) interconnected to form an endless tread band (12). The people conveyor drive (40) comprises a tension member drive system (25) configured for driving the endless tread band (12), and a shaft (50) having a shaft main portion (52) and at least one shaft support portion (54). The at least one shaft support portion (54) is supported by at least one shaft bearing (57) to be rotatable around a shaft axis (A). The shaft (50) is configured for engaging with an endless tread drive tension member (15). The shaft (50) has a split shaft configuration in which the shaft main portion (52) is detachably coupled to the at least one shaft support portion (54).